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- W4386429323 abstract "Some of the synthesis methods and physical properties of iron oxide-based magnetic nanoparticles such as Fe <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>3- x</inf> O <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>4</inf> and CoxFe <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>3-x</inf> O <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>4</inf> are reviewed because of their interest in health, environmental applications, and ultra-high density magnetic recording. Unlike high crystalline quality nanoparticles larger than a few nanometers that show bulk-like magnetic and electronic properties, nanostructures with increasing structural defects yield a progressive worsening of their general performance due to frozen magnetic disorder and local breaking of their crystalline symmetry. Thus, it is shown that single-crystal, monophasic nanoparticles do not exhibit significant surface or finite-size effects, such as spin canting, reduced saturation magnetization, high closure magnetic fields, hysteresis loop shift, or dead magnetic layer, features which are mostly associated with crystallographic-defective systems. Besides, the key role of the nanoparticle coating, surface anisotropy, and inter-particle interactions are discussed. Finally, the results of some single particle techniques -magnetic force microscopy, X-ray photoemission electron microscopy, and electron magnetic chiral dichroism- that allow studying individual nanoparticles down to sub-nanometer resolution with element, valence, and magnetic selectivity, are presented. All in all, the intimate, fundamental correlation of the nanostructure (crystalline, chemical, magnetic…) to the physical properties of the nanoparticles is ascertained." @default.
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- W4386429323 date "2023-05-01" @default.
- W4386429323 modified "2023-10-16" @default.
- W4386429323 title "Magnetic Nanoparticles: from the Nanostructure to the Physical Properties" @default.
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- W4386429323 doi "https://doi.org/10.1109/intermagshortpapers58606.2023.10228434" @default.
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